some pressure concepts i don't understand


by benedict9999
Tags: concepts, pressure
benedict9999
benedict9999 is offline
#1
Sep17-09, 09:39 PM
P: 4
1. The problem statement, all variables and given/known data

The pressure at 10 m below the surface of the ocean is about 2.0010^5 Pa.

Which of the following statements is true?

a. The weight of a column of seawater 1 m^2 in cross section and 10 m high is about 2.0010^5 N.
b. The weight of a column of seawater 1 m^2 in cross section and 10 m high plus the weight of a column of air with the same cross section extending up to the top of the atmosphere is about 2.0010^5 N.
c. The weight of 1 m^3 of seawater at 10 m below the surface of the ocean is about 2.0010^5 N.
d. The density of seawater is about 2.0010^5 times the density of air at sea level.

I may sound a bit greedy but if you can please explain why it is that and why others aren't right
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tiny-tim
tiny-tim is offline
#2
Sep18-09, 07:48 AM
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tiny-tim's Avatar
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Hi benedict9999! Welcome to PF!
Quote Quote by benedict9999 View Post
I may sound a bit greedy but if you can please explain why it is that and why others aren't right
No, you first!

Tell us which one you think it is, and why.

( Start with the definition of pressure )


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